Questions About Updating Older Core Data / iCloud App to Core Data / CloudKit

Once I have the path, I plan to do this.

lazy var persistentContainer: NSPersistentCloudKitContainer = {

let container = NSPersistentCloudKitContainer(name: “MyAppName”)

// Create a store description for a CloudKit-backed local store

let cloudStoreLocation = URL(fileURLWithPath: Original or Ubiquity Path)

let cloudStoreDescription =

NSPersistentStoreDescription(url: cloudStoreLocation)

cloudStoreDescription.configuration = "Cloud"

// Set the container options on the cloud store

cloudStoreDescription.cloudKitContainerOptions =

NSPersistentCloudKitContainerOptions(

containerIdentifier: "com.my.container")

// Update the container's list of store descriptions

container.persistentStoreDescriptions = [

cloudStoreDescription,

]

// Load store

container.loadPersistentStores { storeDescription, error in

guard error == nil else {

fatalError("Could not load persistent stores. \(error!)")

}

}

return container

}()

Although, I probably won't use a configuration as it's all going to sync.

Do not attempt to reuse the ubiquity store file. The only possible migration path is a heavy weight migration, that is manually moving objects from the ubiquity store to a new store file to use with CloudKit.

You also need to be aware that in doing this, you are forever leaving behind clients on mixed versions of your app unless you plan to support bi-directional sync between the ubiquity and cloudkit stores yourself.